<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="./jump.css">
    <title>弹力小球制作</title>
</head>
<body> 
    <!-- 弹跳小球背 景 -->
    <div class="container">
      <!-- 红球 -->
      <div class=" box red">
        <div class="boll"></div>
        <div class="shadow"></div>
      </div>
      <!-- 绿球 -->
      <div class=" box green">
        <div class="boll"></div>
        <div class="shadow"></div>
      </div>
      <!-- 篮球 -->
      <div class=" box blue">
        <div class="boll"></div>
        <div class="shadow"></div>
      </div>
    </div>

</body>
</html>